video: fbdev: aty: do not leak uninitialized padding in clk to userspace

'clk' is copied to a userland with padding byte(s) after 'vclk_post_div'
field unitialized, leaking data from the stack. Fix this ensuring all of
'clk' is initialized to zero.

References: https://github.com/torvalds/linux/pull/441
Reported-by: sohu0106 <sohu0106@126.com>
Signed-off-by: Vladis Dronov <vdronov@redhat.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/video/fbdev/aty/atyfb_base.c b/drivers/video/fbdev/aty/atyfb_base.c
index f49efb2fb75f..3ec72f19114b 100644
--- a/drivers/video/fbdev/aty/atyfb_base.c
+++ b/drivers/video/fbdev/aty/atyfb_base.c
@@ -1855,7 +1855,7 @@ static int atyfb_ioctl(struct fb_info *info, u_int cmd, u_long arg)
 #if defined(DEBUG) && defined(CONFIG_FB_ATY_CT)
         case ATYIO_CLKR:
                 if (M64_HAS(INTEGRATED)) {
-                        struct atyclk clk;
+                        struct atyclk clk = { 0 };
                         union aty_pll *pll = &par->pll;
                         u32 dsp_config = pll->ct.dsp_config;
                         u32 dsp_on_off = pll->ct.dsp_on_off;